David and Marie Weimar Koenig were my Great Grandparents on my father's side. I know that David had a paint store and was joined by brother-in-law, Henry Gross. I would like to know more about Henry's family as it might lead to clues to Marie's family. I know who David's siter was and she was never married to a Henry, so he has to be Marie's brother -in-law.
Thanks- Lin Irish